A mountain rising inside Tycho
Event image. Oblique NAC view captured on 10 June 2011, in observations M162350671L/R. The scene is about 1.2 kilometres wide and the summit boulder roughly 120 metres across. The 2017 archive upload is not the capture date.
NASA/JPL image-use policy · credited mission imagery, resized to WebP
· Original image source · Image licenceLook from the central peak down to the impact-shaped floor.
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Look closer
Tycho’s central peak and rugged floor preserve contrasting textures within one crater. Low-angle views emphasise relief; overhead scenes make the pattern of deposits easier to follow.
Follow the evidence
Browse the peak, floor and ejecta close-ups as different parts of the same impact landscape. Shadows can make isolated rocks seem enormous, so retain the source scale when interpreting details.
The same boulder from two directions
Mark Robinson’s LROC account compares the June 2011 oblique image with a 2010 overhead observation of the same roughly 120-metre boulder. Fractured material interpreted as solidified impact melt surrounds it. The relationship suggests the central peak already existed when melt arrived, though Robinson leaves the emplacement mechanism open. Comparing actual exposures helps separate rock geometry from dramatic sunrise shadows; neither view records the impact or mountain rising. The account dates that overhead view to May, while its cited PDS record has an April timestamp; this discrepancy remains unresolved.
A terrain model has gaps as well as detail
Victoria Roseborough describes the Tycho central-peak elevation mosaic as a product of thirty-two NAC images arranged into eight stereo sets. Different viewing angles supply depth through parallax, while varying sunlight helps reveal shadowed slopes. Acquiring the coverage took seven years. Black areas in the relief map mark places where shadow prevented elevation recovery. A model-based flyover can make this terrain understandable, but its virtual viewpoint and missing-data areas must remain distinct from a spacecraft photograph.
Sources & further reading
- Tycho Central Peak Spectacular — NASA Image and Video Library / GSFC
- The Floor of Tycho — NASA Image and Video Library / JPL
- Ejecta in Tycho Crater — NASA Image and Video Library / JPL
- Tycho Central Peak Spectacular! — Mark Robinson — LROC / Arizona State University
- Tycho: A Model Central Peak — Victoria Roseborough — LROC / Arizona State University
- M127008391L — original NAC observation metadata — LROC / NASA Planetary Data System